Magnetic Effects Of Current Question 190
Question: The coil of a galvanometer consists of 100 turns and effective area of 1 square cm. The restoring couple is $ {{10}^{-8}},N-m/radian $ . The magnetic field between the pole pieces is 5 T. The current sensitivity of this galvanometer will be [MP PMT 1997]
Options:
A) $ 5\times 10^{4},rad/\mu ,amp $
B) $ 5\times {{10}^{-6}},per,amp $
C) $ 2\times {{10}^{-7}},per,amp $
D) $ 5,rad/\mu ,amp $
Show Answer
Answer:
Correct Answer: D
Solution:
Current sensitivity $ \frac{\theta }{i}=\frac{NBA}{C} $
$ \Rightarrow \frac{\theta }{i}=\frac{100\times 5\times {{10}^{-4}}}{{{10}^{-8}}}=5\ rad/\mu \ Amp $
BETA
